diff --git a/assets/css/common/post-single.css b/assets/css/common/post-single.css
index b9b9709..9f6138e 100644
--- a/assets/css/common/post-single.css
+++ b/assets/css/common/post-single.css
@@ -192,7 +192,7 @@
     display: none;
 }
 
-.post-content code {
+.post-content code:not(.language-mermaid) {
     margin: auto 4px;
     padding: 4px 6px;
     font-size: 0.78em;
@@ -201,7 +201,7 @@
     border-radius: 2px;
 }
 
-.post-content pre code {
+.post-content pre code:not(.language-mermaid) {
     display: block;
     margin: auto 0;
     padding: 10px;